chore(deps): Widen cw-celerytask-helpers version range again

This time no upper range.

cubicweb_celerytask/__pkginfo__.py

@@ -18,7 +18,7 @@ __depends__ = {
     'cubicweb': '>= 3.26.18',
     'six': '>= 1.4.0',
     'celery': '>=4,<5',
-    'cw-celerytask-helpers': '>= 0.7.0, < 0.9.0',
+    'cw-celerytask-helpers': '>= 0.7.0',
 }
 __recommends__ = {}